Of course I don't think that the best games that will ever exist have already been made.1 But to willfully ignore decades of artistic endeavor seems narrow-minded.
1: Slay The Spire is a good example here; it would be technologically possible to create a version of that game in DOS but we hadn't really explored the idea of deck-building games until Dominion in 2008. Breath of the Wild is a great example of a style of gameplay newer tech made possible.